IBM LoadLeveler for AIX 5L: Using and Administering

64-bit support for Accounting functions

If the flags associated with the configuration keyword ACCT are turned on (A_ON, A_DETAIL), accounting statistics of jobs managed by a LoadL_schedd daemon are saved in a "history" file. This file resides in the "spool" directory of the LoadL_schedd daemon.

In LoadLeveler 3.1, a number of changes have been made to the format of the history file and the methods used to access this file. These changes include:

• Statistics of jobs such as usage, limits, consumable resources, and other 64-bit integer data are preserved in the history file as rusage64, rlimit64 structures and as data items of type int64_t.
• In LoadLeveler 2.2, data contained in a history file is accessible to users through the llsummary command and the GetHistory() interface of the LoadLeveler API library. In LoadLeveler 3.1 the GetHistory() interface has been enhanced. The LL_job_step structure defined in llapi.h has been modified so that users of the GetHistory() interface can gain access to the 64-bit data items either as data of type int64_t or as data of type int32_t. In the latter case, the returned values may be truncated.
• The llsummary command has been modified to display 64-bit information where appropriate.
• The LLAPI_Specification enum defined in llapi.h has been significantly expanded and the ll_get_data() interface modified so that 32-bit and 64-bit accounting and usage information of a history file can also be accessed through this interface. Please refer to the code fragment on page *** for an example of how to use the ll_get_data() subroutine to access information stored in a LoadLeveler history file.

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